Magneto.



L. H. N. LOUPRET.

MAGNETO. APPLlCATiOIi FILED FEB. I. IQI S.

Patented July 3, 1917.

2 SHEETSQSHEET i.

L. H. N. LOUPRET.

MAGNETO. APPLICATION FILED FEB-1.1915. 1,231,919. Patented July 3, 1917.

2 $HEET$$HEET 2.

r II; o A /i LIONEL N. LGUFEEE,

Application filed lfiebruary 1, i

To (/11 "whom it may concern:

Be it known that I, LIONEL lil. Lournu'r, a citizen of the United States, residu'ig ignore becon whatmay he called a reversible magneto.

My invention is partic" ar y well adapted for use with two-cycle 1i. -nal combustion engines, as for mot r boats, and the like,

where the engine is reouired to be driven in one direction to more are boat a lead, and oppositely to cause the bo:-.t to go astern.

One feature of my said invention may he said to reside in a cam 1110i .tetl a hrealterbox that may, by adjustment. when the engine is driving the armature or one opposite thereto, cause seasonahle engagement ofthe cam and the make-and break mechanism, the purpose of ad vancing or retarding the interruption of the electrical current, and hence the formation of an ignition spark, or for the purpose of stopping the engine, by rendering the magneto a non-effective spark producer.

A further feature of my invention is embodied in the pole-pieces of the armature and of the magnet, whose adjacent surfaces have a substantially common curvature, while the length of the chord or line connecting the ends of the are of the end surfaces of the pole-piece of the armature is less than the shortest distance betweenthe pole-pieces of the magnet; that iseach polepiece of the arn'latlure must not overlap both pole-pieces of the magnet, if it does the magneto is not revers ble.

In the drawin illustrating the principle of my invention and the best mode now known to me of embodying the same in op erative structure,

Figures 1 and 2 are end elevations of my invention, in two of the various positions it may assume as shown in the diagrammatic views mentioned hereinafter.

Fig. 3 is a side elevation of what appears in Fig. 1, while niakeai'idhrealr Quill. a

shows a perspective view of a with cam ai'iixed therein.

7, 7 8, 8 show various ous positions assumed reie cam and interrupting deand pole pieces of the .g with the armature a, 15 a plate 1 ngs. l and 2, upon which mounted a make-and-break.lever 2 pi;- 1. y 1- -11} i U H t o, ant an a( usta ac (01km t sci-2w o contact with the lever: a spring 5 tend- 1 l i to keep the screw 4. and the lever 2 in erate thelever, when the turn 6, see Figs. 5 to 8 inclusive. bears certain relations to'the. i f magnet is a cam oppositely inclined cud T ed to the inside of a g "which is in frictional engagement with a suitable hearing upon the frame is of the generator. and concentric with the longitudinal axis X? of the armature 6., This casing 1-3 has'a handle 15 whereby it may he moved, say 90 defaces 11, and

grass, to the or left of a vertical position, this movement being determined and limited by the sides and the ends of a slot 16, Figs. 3 and 4, in the casing, and an abutment 1'? therefor in the frame 14. As the primary electrical circuit,'if the magneto is to be reversible, must be broken once for each "-u'olution of the armature, in either dlrection, and preferably when it bears the proper angularity to the pole-pieces 18 of the magnet, say as shown in the diagram matic views, the cam-piece i0 is made of such length that when one end cam surface as 11 for opening the circuih is in proper position for so opening the circuit when the armature is revolving in one direction, the other end cam surface 12 at the opposite end of cam-piece, not 'only permits the timely closing of the make-and-bruik lever 52, of the primary circuit, before it is again opened; hut, when the armature is to he rotated in an opposite directhrn, may be 'progr erly positioned to cause the make-amt:weak lever to break the primary circuit when the arn'lature bears the proper augularitv with the magnetic field of the magnet: the other cam as 11, which prc .'iousl served to open the primary circuit. now serving to close it.

it is to be noted that the chord 19. Fig. 5,

ie are of th arm e pole i in t 1, less than the distance between the ppole-pieces 18 of themagnet, and must a1-.

- fine, I haveprovided means whereby ways be less, or in other words, the .pole the electricsparkmay be generated by the magneto, be advanced, or retarded, or be pieces of the field do not overlap the limit-If ing radii,- as 20, 21, of the armature 6.

-, A reference to Figs. 5 to 8 inclus'ivewill make plain the disposition and the certainty of operation of the various cooperating parts. Vhen the handle'l5, Fig. 5, control-' ling the breaker-box and hence the operating 10' cam surfaces 11,12, is in the position at the right, the armature ,6, Fig. 5?, must rotate. to the left, as indicated by the arrow; and: the primary circuit will, when ,the armatureand-pole'pieces of the'. magnet bear the rela= tions shown inFigB, .be broken by the engagement' of the cam surface 11 with the inake-and-break' lever 2, indicated by roll 2,

- the spark formed being most advanced, but

"if the lever be moved still more; toward the left until it assumes the position indicated Fig.6, theafmat'ure 6, Fig. .6, will assume less effective positien' for the cam to cause -Tthe lever to break the circuit, and the spark.

-- i will, be retarded; so that'substantially within "engages the break lever "these. limitsof movement'ofthe cam-piece ture iscrotatin'g in one direction. Now if the handle ilfibe given an upright position,.t'h e I sparkwill be so retarded that the engine will stop Should the handle 15 be removed to "the left from this upright position, and the armature be caused to rotate in the opposite direction, as shown in Fig. I, the" other cam vvsurface 12 movesinto a' position to break ,the primary, circuit,-that is to a retarded ''.'posi tion; but if'the handle 15 be moved still farther to the. left, to a positionshown in-Fig.

,8,-the armature 6, Fig. 8 would assume and occupy an advanced position in relation to the. poles of the magnet, when thecam 12 2 and thus opens the circuit.

. Shouldthe handle'15 be moved into a horizontal'position either to-the right or the left of the magnet.

the vertical, substantially no spark would beformed'by virtue of the relative position of the armature to the field of -cam piece adjustably mounted .upon frame of magneto and. concentric with a longitudi-.

'nal aX-is of the armature, said cam pieceto. 'have three cams in one continuous surface, -0I16'COI1CBI113I1G with the axis of the armature to hold the interrupting dev'i'ce open, and the other two, endv cams,seasonab,ly to open and close said device, once for each revolution-of thea'rmatu're in either direction.

2. In a reversiblehigh tension'magneto, a

make and break lever of an interrupting device fixed to and rotating with the armature I shaft; acam piece adjustably mounted upon 10', may the circuit be broken. while the armathe frame of magneto and concentric with the longitudinalaxis of ,the armature, sa d cam piece to have'three cams in one continuous surface, one concentric with the axis to hold interrupting device open, and the I other two, end cams, seasonably'to open and close said device, once for each revolution of the armature,'1n elther directlon; and an armature each of whose pole pieces 1s, in

-Width, less than the distance between the pole pieces of the magnet.

.3. In a reversible high-tension magneto, armature pole piec'es whose chord of the arc of the pole surface, is,-in length, less than the shortest distance between the pole pieces of the field.

In testimony whereof I hereunto aflixv my -.signature in the presence of two witnesses.

LIONEL H. LOUPRET.

NVitnesses: I

' CHARLES F. RICHARDSON,

JOSEP A. LEGARE. 

